SUPPLEMENTAL OIL AND GAS DISCLOSURES (Unaudited) (Components Of The Standardized Measure Of Discounted Future Net Cash Flows) (Details) $ in Thousands	1 Months Ended	11 Months Ended	12 Months Ended
	Feb. 08, 2018 USD ($) MMcf $ / bbl	Dec. 31, 2018 USD ($) MMcf $ / bbl	Dec. 31, 2019 USD ($) MMcf $ / bbl	Dec. 31, 2017 USD ($)
Components of the standardized measure of discounted future net cash flows
Future cash inflows	$ 5,798,886	$ 2,446,888	$ 1,326,490
Future production costs	(2,556,361)	(1,214,479)	(825,300)
Future development costs	(965,780)	(23,183)	(25,251)
Future income taxes	0	(146,632)	(26,707)
Future net cash flows	2,276,745	1,062,594	449,232
Discount to present value at 10 percent per annum	(1,096,859)	(348,311)	(122,321)
Standardized measure of discounted future net cash flows	$ 1,179,886	$ 714,283	$ 326,911	$ 1,105,922
Base price for crude oil, per barrel, in the above computation | $ / bbl	52.89	65.56	55.69
Base price for gas, per Mcf, in the above computation | MMcf	2.99	3.10	2.58
Realized price for NGLs, per barrel, in the above computation | MMcf	27.48	22.44	14.60